first sorry my inglix, im from spain 
im making "similar" project, and... why use BIGGER pulley? im going to use smaller. If you use bigger one, you have less rpm on pump!!! thats not good to make more pressure at low rpm. Here on pic you can see bottom pulley 21tooth , pump pulley 42 (2/1). When crack pulley makes 360º, pump pulley makes 180º. (this is using same timming belt)
![[Image: a0xrwp.jpg]](http://oi65.tinypic.com/a0xrwp.jpg)
Have you calculated correctly pulley size?
And...How you are going to regulate pressure on rail? i have moddified a small rail from audi v8 to regulate fuel on rail:![[Image: whl3bn.jpg]](http://oi65.tinypic.com/whl3bn.jpg)
I've been here, in a quiet corner, year and a half watching the evolution of your project. amazing project!
im making "similar" project, and... why use BIGGER pulley? im going to use smaller. If you use bigger one, you have less rpm on pump!!! thats not good to make more pressure at low rpm. Here on pic you can see bottom pulley 21tooth , pump pulley 42 (2/1). When crack pulley makes 360º, pump pulley makes 180º. (this is using same timming belt)
Have you calculated correctly pulley size?
And...How you are going to regulate pressure on rail? i have moddified a small rail from audi v8 to regulate fuel on rail:
I've been here, in a quiet corner, year and a half watching the evolution of your project. amazing project!